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Clupeiformes (Herrings) >
Dorosomatidae (Gizzard shads and sardinellas)
Etymology: Potamothrissa: Greek, potamos = river + Greek, thrissa, -es = shad (Ref. 45335); obtusirostris: Named for the Lembesse River (Ref. 83895).
More on author: Boulenger.
Environment: milieu / climate zone / depth range / distribution range
Οικολογία
; Γλυκού νερού Πελαγικό(ά). Tropical; 7°N - 8°S
Africa: middle and upper Congo River basin (Ref. 3509, 28136, 93833), especially in northern and eastern tributaries (Ref. 188, 122734), and lower Congo River (Ref. 42510), in Central African Republic (Ref. 45441), Republic of Congo (Ref. 83895) and Democratic Republic of the Congo (Ref. 42480).
Μέγεθος / Βάρος / Age
Maturity: Lm ? range ? - ? cm
Max length : 6.0 cm SL αρσενικό/απροσδιόριστο; (Ref. 188)
Short description
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Ραχιαίες άκανθες (συνολικά) : 0; Μαλακές ραχιαίες ακτίνες (συνολικά) : 13 - 15; Εδρικές άκανθες: 0; Μαλακές εδρικές ακτίνες: 16 - 20. Diagnosis: Body slender, its depth 18-27% of standard length; pre-pelvic scutes not strongly keeled, beginning under or behind base of last pectoral finray, 7-10 pre-pelvic and 9-12 post-pelvic scutes, belly rounded; snout bluntly rounded; lower jaw not projecting, exactly meeting tip of upper when mouth closed, deepest at mid-point of jaw, with small saw-like teeth on each side; pre-maxillae with small teeth pointing downward; maxilla very slender, its blade over 3 times as long as deep, upper edge ridged, lower edge without denticulations; posterior supra-maxilla very small, spatulate, its shaft about as long as its blade; lower gillrakers 14-16; silver stripe on flank, narrower anteriorly (Ref. 188, 28136). It differs from Potamothrissa whiteheadi in having a distinct shaft to the posterior supra-maxilla and lacking dermal denticles on the snout, and from P. acutirostris in its blunt snout and fewer gillrakers, 14-16 vs. 16-18 (Ref. 188, 28136). Other pellonulines lack saw-like teeth at the sides of the lower jaw (Ref. 188).
Found in rivers and streams (Ref. 41580), perhaps not in lakes (Ref. 188). It feeds on aquatic insects and also hydracarians (Ref. 188, 41580).
Life cycle and mating behavior
Maturities | Αναπαραγωγή | Spawnings | Egg(s) | Fecundities | Προνύμφες
Whitehead, P.J.P., 1985. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (suborder Clupeoidei). An annotated and illustrated catalogue of the herrings, sardines, pilchards, sprats, shads, anchovies and wolf-herrings. FAO Fish. Synop. 125(7/1):1-303. Rome: FAO. (Ref. 188)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
αλιεία: παραδοσιακή αλιεία
Εργαλεία
Special reports
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Διαδικτυακές πηγές
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00433 - 0.01920), b=3.04 (2.87 - 3.21), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Τροφικό Επίπεδο (Ref.
69278): 3.2 ±0.40 se; based on food items.
Ελαστικότητα (Ref.
120179): Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
